package xyz.zichengdulin.filter;

import jakarta.servlet.*;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;

//@WebFilter(urlPatterns = "/*")  //拦截所有请求
@Slf4j
public class DemoFilter implements Filter {

    //初始化方法，web服务器启动时执行一次
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        log.info("Demofilter初始化");
    }

    //拦截到请求之后执行，会执行多次
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        log.info("Demofilter拦截到请求了");
        //放行
        filterChain.doFilter(servletRequest, servletResponse);
    }

    //销毁方法，web服务器关闭时执行一次
    @Override
    public void destroy() {
        log.info("Demofilter销毁");
    }
}
